In a revealing cover story for Seventeen magazine, the 16-year-old actress says two of her brothers endured miserable abuse from peers because of their homosexuality — and she won’t stand for any further abuse of her family.

"I have two gay brothers and two straight brothers, and my gay brothers were treated horrifically until they grew up and understood how to deal with it," Moretz told the magazine in a cover story for the September issue.

One of Moretz’s brothers, Trevor Duke-Moretz (right), a fellow actor, helped the actress get her start, by coaching her on lines and prepared for auditions when she first broke into the business as a 7-year-old. ‘I got into it through my brother Trevor and I just started remembering his monologues and memorizing them to anyone who would really listen to me,’ she told The News in August. (David Livingston/Getty Images)

"I will delete you and I will block you, and you will not be a part of my life if you ever say anything bad about my brothers."

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Though the Atlanta-born Moretz has grown up in the spotlight since beginning an acting career at the ripe old age of the 7, she says her family keeps her grounded.

Chloe Grace Moretz (center) and two of her her brothers attend the Veuve Clicquot Gold Cup Final at Cowdray Park Polo Club in July 2011. (Dave M. Benett/Getty Images)

"Never choose your friends over your family or a boyfriend or girlfriend over the family," she told Seventeen in the issue that hits newstands on Sept. 17. "My mom has always taught us that blood is thicker than water. No one will ever understand the dynamic of your family. Ever. We are the closest family ever and we are the most insane family ever.

Besides, she told the Daily News, last month, growing up as the only girl in a household with four brothers prepared her for her budding career as an action star.

"The fact that we've been doing action sequences since I was a little kid," she told the Daily News before the release of "Kick Ass 2," in which she plays a violent teen vigilante. "I grew up in that atmosphere where either you learn to play football or you don't play at all.

Moretz stars as the titular telekinetic in the upcoming ‘Carrie.’ (Michael Gibson)

"My family is the biggest part of my entire life and no matter what they always take precedence over anything that goes on in my career."

Her latest film, "Carrie," a remake of the 1976 horror classic, hits theaters on Oct. 18.